CVE-2026-5971
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA flaw has been found in FoundationAgents MetaGPT up to 0.8.1. This vulnerability affects the function ActionNode.xml_fill of the file metagpt/actions/action_node.py of the component XML Handler. Executing a manipulation can lead to improper neutralization of directives in dynamically evaluated code. The attack may be launched remotely. The exploit has been published and may be used. The project was informed of the problem early through a pull request but has not reacted yet.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA code injection vulnerability exists in MetaGPT's ActionNode.xml_fill function in metagpt/actions/action_node.py. The XML handler fails to properly neutralize directives in dynamically evaluated code, allowing remote attackers to inject malicious code through crafted XML input processed by the xml_fill function.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 0.8.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify MetaGPT is installedRun 'pip show metagpt' or check your project dependencies to confirm the package is presentAffected if MetaGPT package is not installed or not in use
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Check installed MetaGPT versionRun 'pip show metagpt' and look for the Version field, or import metagpt and print(metagpt.__version__)Affected if Version is 0.8.1 or lower
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Locate the vulnerable fileSearch for the file 'metagpt/actions/action_node.py' in your environment or installed package directoryAffected if The file exists and contains the xml_fill function
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Determine if xml_fill is used with external inputSearch your codebase for calls to xml_fill, especially where XML input originates from user input, external APIs, or untrusted sourcesAffected if xml_fill processes XML from untrusted or external sources without validation
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Inspect XML processing configurationReview any XML parsing configurations or custom XML handlers in your ActionNode usageAffected if Custom XML handlers or dynamic code evaluation is enabled in xml_fill processing
You are affected if MetaGPT version 0.8.1 or lower is installed AND the xml_fill function processes XML input from untrusted or external sources.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUntil an official fix is released, avoid using xml_fill with untrusted or external XML input. Implement strict input validation and sandboxing around XML processing. Consider upgrading to a patched version once available.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-5971 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-5971 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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